5K20.30 Jumping Ring

Place a closed ring around the copper core and turn on the coil to make the ring jump. Then show how the open ring doesn’t jump. Holding a closed ring in place around the core with a pair of tongs while powering the coil will cause the ring to heat up. Place it in a cup of water to produce steam. Cool it down to liquid nitrogen temperatures and observe the difference in height.

For an analysis on the jumping ring, see AJP 69(8), 911.

Location: Apparatus: H2-3; Switch: HI-2